Sarah Michelle Gellar turns 34 today! Her role in Buffy the Vampire Slayer took her from daytime sweetheart to primetime star 15 years ago and she's been a fan favorite ever since. SMG's been working on a new TV pilot, Ringer, lately but the actress also has her gorgeous husband and adorable baby girl to keep her busy. Take a look back at her Hollywood past as we celebrate SMG's birthday!